#pragma once

#include <iostream>
#include <unistd.h>

using namespace std;

typedef void (*work_t)(int);        // 函数指针类型
typedef void (*task_t)(int, pid_t); // 函数指针类型

void PrintLog(int fd, pid_t pid)
{
  cout << "sub process: " << pid << ", fd: " << fd << ", task is : printf log task\n"
       << endl;
}

void ReloadConf(int fd, pid_t pid)
{
  cout << "sub process: " << pid << ", fd: " << fd << ", task is : reload conf task\n"
       << endl;
}

void ConnectMysql(int fd, pid_t pid)
{
  cout << "sub process: " << pid << ", fd: " << fd << ", task is : connect mysql task\n"
       << endl;
}

task_t tasks[3] = {PrintLog, ReloadConf, ConnectMysql};

uint32_t NextTask()
{
  return rand() % 3;
}

void worker(int fd)
{
  // 从0中读取任务即可！
  while (true)
  {
    uint32_t command_code = 0;
    ssize_t n = read(0, &command_code, sizeof(command_code));
    if (n == sizeof(command_code))
    {
      if (command_code >= 3)
        continue;
      tasks[command_code](fd, getpid());
    }
    else if (n == 0)
    {
      std::cout << "sub process: " << getpid() << " quit now..." << std::endl;
      break;
    }
  }
}